Overall Framework of Mobile Toilet

The overall framework of a mobile toilet serves as its 'skeleton', supporting the structure and ensuring stability. It is mainly divided into two types based on material and craftsmanship: steel framework and fiberglass-reinforced plastic (FRP) integrated molding framework, and includes wall and roof structures.

1. Steel Framework

The steel framework is currently the most commonly used and sturdiest type, typically welded from galvanized square tubes or channel steels, offering strong load-bearing and wind-resistant capabilities. Its material is galvanized steel (hot-dip galvanized square/rectangular tubes), which effectively prevents rust and corrosion through galvanization, extending its service life. Structural features include:

• Bottom: Usually welded with channel steels or I-beams to form the chassis, which is the most stressed part of the entire framework, ensuring no deformation during lifting. The stability of the chassis directly determines the safety of the mobile toilet during transportation and use.
• Columns: Square steels or tubes are used as vertical supports to ensure the vertical stability of the toilet. The strength and perpendicularity of the columns are crucial for preventing the overall structure from tilting.
• Welding Process: Full-penetration welding is employed to ensure firm connections at framework joints, enabling it to withstand multiple liftings and relocations. This welding process tightly integrates all parts of the framework, avoiding safety hazards caused by loose connections.

2. Fiberglass-Reinforced Plastic (FRP) Integrated Molding Framework

The FRP integrated molding framework is commonly found in small, single-unit mobile toilets, characterized by its lightweight and corrosion resistance, though its load-bearing capacity is relatively weaker than that of steel. Its material is glass fiber-reinforced plastic (commonly known as FRP), and its structural feature is integrated molding using molds, with no obvious welding points, offering good overall sealing, a smooth appearance, and resistance to rust, making it suitable for scenarios requiring frequent handling.

3. Wall and Roof Structures

A complete framework system also includes wall and roof structures:

• Wall Structure: Based on the steel skeleton, polyurethane or rock wool is filled as insulation, and the interior and exterior are covered with color-coated steel plates, metal carved plates, or aluminum-plastic composite panels. These materials not only provide good insulation but also enhance the toilet's appearance.
• Roof Structure: Typically designed with a gable roof, internally supported by steel frames and externally covered with asphalt shingles or color-coated steel tiles to ensure smooth drainage. The gable roof design facilitates rapid rainwater drainage, preventing water accumulation and damage to the toilet.